The number here ($2.5 billion) seems to be ~20% of Boeing's 2016 EBITDA (earnings before interest, taxes, depreciation, amortization) and ~18% of their 2017 EBITDA. It's ~700% of their 2019 EBITDA (they had a pretty bad year revenue-wise in 2019) and I expect they will have a significantly negative EBITDA for 2020 (it's -$4.6 billion for the 12 months through 2020-09-30).

Looking at historical trends at https://www.macrotrends.net/stocks/charts/BA/boeing/ebitda it looks like it's something like 25% of an eyeballed "average year" for Boeing.

I suspect you're right that this is a little low given what was going on here.